1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #if 0 37 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/cdefs.h> 42 #include <sys/param.h> 43 #define _WANT_MNTOPTNAMES 44 #include <sys/mount.h> 45 #include <sys/stat.h> 46 #include <sys/wait.h> 47 48 #include <ctype.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <fstab.h> 52 #include <paths.h> 53 #include <pwd.h> 54 #include <signal.h> 55 #include <stdint.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 #include <libutil.h> 61 #include <libxo/xo.h> 62 63 #include "extern.h" 64 #include "mntopts.h" 65 #include "pathnames.h" 66 67 #define EXIT(a) { \ 68 xo_close_container("mount"); \ 69 xo_finish(); \ 70 exit(a); \ 71 } 72 73 /* `meta' options */ 74 #define MOUNT_META_OPTION_FSTAB "fstab" 75 #define MOUNT_META_OPTION_CURRENT "current" 76 77 static int debug, fstab_style, verbose; 78 79 struct cpa { 80 char **a; 81 ssize_t sz; 82 int c; 83 }; 84 85 char *catopt(char *, const char *); 86 int hasopt(const char *, const char *); 87 int ismounted(struct fstab *, struct statfs *, int); 88 int isremountable(const char *); 89 int allow_file_mount(const char *); 90 void mangle(char *, struct cpa *); 91 char *update_options(char *, char *, int); 92 int mountfs(const char *, const char *, const char *, 93 int, const char *, const char *); 94 void remopt(char *, const char *); 95 void prmount(struct statfs *); 96 void putfsent(struct statfs *); 97 void usage(void); 98 char *flags2opts(int); 99 100 /* Map from mount options to printable formats. */ 101 static struct mntoptnames optnames[] = { 102 MNTOPT_NAMES 103 }; 104 105 /* 106 * List of VFS types that can be remounted without becoming mounted on top 107 * of each other. 108 * XXX Is this list correct? 109 */ 110 static const char * 111 remountable_fs_names[] = { 112 "ufs", "ffs", "ext2fs", 113 0 114 }; 115 116 static const char userquotaeq[] = "userquota="; 117 static const char groupquotaeq[] = "groupquota="; 118 119 static char *mountprog = NULL; 120 121 static int 122 use_mountprog(const char *vfstype) 123 { 124 /* XXX: We need to get away from implementing external mount 125 * programs for every filesystem, and move towards having 126 * each filesystem properly implement the nmount() system call. 127 */ 128 unsigned int i; 129 const char *fs[] = { 130 "cd9660", "mfs", "msdosfs", "nfs", 131 "nullfs", "smbfs", "udf", "unionfs", 132 NULL 133 }; 134 135 if (mountprog != NULL) 136 return (1); 137 138 for (i = 0; fs[i] != NULL; ++i) { 139 if (strcmp(vfstype, fs[i]) == 0) 140 return (1); 141 } 142 143 return (0); 144 } 145 146 static int 147 exec_mountprog(const char *name, const char *execname, char *const argv[]) 148 { 149 pid_t pid; 150 int status; 151 152 switch (pid = fork()) { 153 case -1: /* Error. */ 154 xo_warn("fork"); 155 EXIT(1); 156 case 0: /* Child. */ 157 /* Go find an executable. */ 158 execvP(execname, _PATH_SYSPATH, argv); 159 if (errno == ENOENT) { 160 xo_warn("exec %s not found", execname); 161 if (execname[0] != '/') { 162 xo_warnx("in path: %s", _PATH_SYSPATH); 163 } 164 } 165 EXIT(1); 166 default: /* Parent. */ 167 if (waitpid(pid, &status, 0) < 0) { 168 xo_warn("waitpid"); 169 return (1); 170 } 171 172 if (WIFEXITED(status)) { 173 if (WEXITSTATUS(status) != 0) 174 return (WEXITSTATUS(status)); 175 } else if (WIFSIGNALED(status)) { 176 xo_warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 177 return (1); 178 } 179 break; 180 } 181 182 return (0); 183 } 184 185 static int 186 specified_ro(const char *arg) 187 { 188 char *optbuf, *opt; 189 int ret = 0; 190 191 optbuf = strdup(arg); 192 if (optbuf == NULL) 193 xo_err(1, "strdup failed"); 194 195 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 196 if (strcmp(opt, "ro") == 0) { 197 ret = 1; 198 break; 199 } 200 } 201 free(optbuf); 202 return (ret); 203 } 204 205 static void 206 restart_mountd(void) 207 { 208 209 pidfile_signal(_PATH_MOUNTDPID, SIGHUP, NULL); 210 } 211 212 int 213 main(int argc, char *argv[]) 214 { 215 const char *mntfromname, **vfslist, *vfstype; 216 struct fstab *fs; 217 struct statfs *mntbuf; 218 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 219 int onlylate; 220 char *cp, *ep, *options; 221 222 all = init_flags = late = onlylate = 0; 223 ro = 0; 224 options = NULL; 225 vfslist = NULL; 226 vfstype = "ufs"; 227 228 argc = xo_parse_args(argc, argv); 229 if (argc < 0) 230 exit(1); 231 xo_open_container("mount"); 232 233 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 234 switch (ch) { 235 case 'a': 236 all = 1; 237 break; 238 case 'd': 239 debug = 1; 240 break; 241 case 'F': 242 setfstab(optarg); 243 break; 244 case 'f': 245 init_flags |= MNT_FORCE; 246 break; 247 case 'L': 248 onlylate = 1; 249 late = 1; 250 break; 251 case 'l': 252 late = 1; 253 break; 254 case 'n': 255 /* For compatibility with the Linux version of mount. */ 256 break; 257 case 'o': 258 if (*optarg) { 259 options = catopt(options, optarg); 260 if (specified_ro(optarg)) 261 ro = 1; 262 } 263 break; 264 case 'p': 265 fstab_style = 1; 266 verbose = 1; 267 break; 268 case 'r': 269 options = catopt(options, "ro"); 270 ro = 1; 271 break; 272 case 't': 273 if (vfslist != NULL) 274 xo_errx(1, "only one -t option may be specified"); 275 vfslist = makevfslist(optarg); 276 vfstype = optarg; 277 break; 278 case 'u': 279 init_flags |= MNT_UPDATE; 280 break; 281 case 'v': 282 verbose = 1; 283 break; 284 case 'w': 285 options = catopt(options, "noro"); 286 break; 287 case '?': 288 default: 289 usage(); 290 /* NOTREACHED */ 291 } 292 argc -= optind; 293 argv += optind; 294 295 #define BADTYPE(type) \ 296 (strcmp(type, FSTAB_RO) && \ 297 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 298 299 if ((init_flags & MNT_UPDATE) && (ro == 0)) 300 options = catopt(options, "noro"); 301 302 rval = 0; 303 switch (argc) { 304 case 0: 305 if ((mntsize = getmntinfo(&mntbuf, 306 verbose ? MNT_WAIT : MNT_NOWAIT)) == 0) 307 xo_err(1, "getmntinfo"); 308 if (all) { 309 while ((fs = getfsent()) != NULL) { 310 if (BADTYPE(fs->fs_type)) 311 continue; 312 if (checkvfsname(fs->fs_vfstype, vfslist)) 313 continue; 314 if (hasopt(fs->fs_mntops, "noauto")) 315 continue; 316 if (!hasopt(fs->fs_mntops, "late") && onlylate) 317 continue; 318 if (hasopt(fs->fs_mntops, "late") && !late) 319 continue; 320 if (hasopt(fs->fs_mntops, "failok")) 321 failok = 1; 322 else 323 failok = 0; 324 if (!(init_flags & MNT_UPDATE) && 325 !hasopt(fs->fs_mntops, "update") && 326 ismounted(fs, mntbuf, mntsize)) 327 continue; 328 options = update_options(options, fs->fs_mntops, 329 mntbuf->f_flags); 330 if (mountfs(fs->fs_vfstype, fs->fs_spec, 331 fs->fs_file, init_flags, options, 332 fs->fs_mntops) && !failok) 333 rval = 1; 334 } 335 } else if (fstab_style) { 336 xo_open_list("fstab"); 337 for (i = 0; i < mntsize; i++) { 338 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 339 continue; 340 xo_open_instance("fstab"); 341 putfsent(&mntbuf[i]); 342 xo_close_instance("fstab"); 343 } 344 xo_close_list("fstab"); 345 } else { 346 xo_open_list("mounted"); 347 for (i = 0; i < mntsize; i++) { 348 if (checkvfsname(mntbuf[i].f_fstypename, 349 vfslist)) 350 continue; 351 if (!verbose && 352 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 353 continue; 354 xo_open_instance("mounted"); 355 prmount(&mntbuf[i]); 356 xo_close_instance("mounted"); 357 } 358 xo_close_list("mounted"); 359 } 360 EXIT(rval); 361 case 1: 362 if (vfslist != NULL) 363 usage(); 364 365 rmslashes(*argv, *argv); 366 if (init_flags & MNT_UPDATE) { 367 mntfromname = NULL; 368 have_fstab = 0; 369 if ((mntbuf = getmntpoint(*argv)) == NULL) 370 xo_errx(1, "not currently mounted %s", *argv); 371 /* 372 * Only get the mntflags from fstab if both mntpoint 373 * and mntspec are identical. Also handle the special 374 * case where just '/' is mounted and 'spec' is not 375 * identical with the one from fstab ('/dev' is missing 376 * in the spec-string at boot-time). 377 */ 378 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 379 if (strcmp(fs->fs_spec, 380 mntbuf->f_mntfromname) == 0 && 381 strcmp(fs->fs_file, 382 mntbuf->f_mntonname) == 0) { 383 have_fstab = 1; 384 mntfromname = mntbuf->f_mntfromname; 385 } else if (argv[0][0] == '/' && 386 argv[0][1] == '\0' && 387 strcmp(fs->fs_vfstype, 388 mntbuf->f_fstypename) == 0) { 389 fs = getfsfile("/"); 390 have_fstab = 1; 391 mntfromname = fs->fs_spec; 392 } 393 } 394 if (have_fstab) { 395 options = update_options(options, fs->fs_mntops, 396 mntbuf->f_flags); 397 } else { 398 mntfromname = mntbuf->f_mntfromname; 399 options = update_options(options, NULL, 400 mntbuf->f_flags); 401 } 402 rval = mountfs(mntbuf->f_fstypename, mntfromname, 403 mntbuf->f_mntonname, init_flags, options, 0); 404 break; 405 } 406 if ((fs = getfsfile(*argv)) == NULL && 407 (fs = getfsspec(*argv)) == NULL) 408 xo_errx(1, "%s: unknown special file or file system", 409 *argv); 410 if (BADTYPE(fs->fs_type)) 411 xo_errx(1, "%s has unknown file system type", 412 *argv); 413 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 414 init_flags, options, fs->fs_mntops); 415 break; 416 case 2: 417 /* 418 * If -t flag has not been specified, the path cannot be 419 * found, spec contains either a ':' or a '@', then assume 420 * that an NFS file system is being specified ala Sun. 421 * Check if the hostname contains only allowed characters 422 * to reduce false positives. IPv6 addresses containing 423 * ':' will be correctly parsed only if the separator is '@'. 424 * The definition of a valid hostname is taken from RFC 1034. 425 */ 426 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 427 (ep = strchr(argv[0], ':')) != NULL)) { 428 if (*ep == '@') { 429 cp = ep + 1; 430 ep = cp + strlen(cp); 431 } else 432 cp = argv[0]; 433 while (cp != ep) { 434 if (!isdigit(*cp) && !isalpha(*cp) && 435 *cp != '.' && *cp != '-' && *cp != ':') 436 break; 437 cp++; 438 } 439 if (cp == ep) 440 vfstype = "nfs"; 441 } 442 rval = mountfs(vfstype, 443 argv[0], argv[1], init_flags, options, NULL); 444 break; 445 default: 446 usage(); 447 /* NOTREACHED */ 448 } 449 450 /* 451 * If the mount was successfully, and done by root, tell mountd the 452 * good news. 453 */ 454 if (rval == 0 && getuid() == 0) 455 restart_mountd(); 456 457 EXIT(rval); 458 } 459 460 int 461 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 462 { 463 char realfsfile[PATH_MAX]; 464 int i; 465 466 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 467 /* the root file system can always be remounted */ 468 return (0); 469 470 /* The user may have specified a symlink in fstab, resolve the path */ 471 if (realpath(fs->fs_file, realfsfile) == NULL) { 472 /* Cannot resolve the path, use original one */ 473 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 474 } 475 476 /* 477 * Consider the filesystem to be mounted if: 478 * It has the same mountpoint as a mounted filesystem, and 479 * It has the same type as that same mounted filesystem, and 480 * It has the same device name as that same mounted filesystem, OR 481 * It is a nonremountable filesystem 482 */ 483 for (i = mntsize - 1; i >= 0; --i) 484 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 485 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 486 (!isremountable(fs->fs_vfstype) || 487 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))) 488 return (1); 489 return (0); 490 } 491 492 int 493 isremountable(const char *vfsname) 494 { 495 const char **cp; 496 497 for (cp = remountable_fs_names; *cp; cp++) 498 if (strcmp(*cp, vfsname) == 0) 499 return (1); 500 return (0); 501 } 502 503 int 504 allow_file_mount(const char *vfsname) 505 { 506 507 if (strcmp(vfsname, "nullfs") == 0) 508 return (1); 509 return (0); 510 } 511 512 int 513 hasopt(const char *mntopts, const char *option) 514 { 515 int negative, found; 516 char *opt, *optbuf; 517 518 if (option[0] == 'n' && option[1] == 'o') { 519 negative = 1; 520 option += 2; 521 } else 522 negative = 0; 523 optbuf = strdup(mntopts); 524 found = 0; 525 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 526 if (opt[0] == 'n' && opt[1] == 'o') { 527 if (!strcasecmp(opt + 2, option)) 528 found = negative; 529 } else if (!strcasecmp(opt, option)) 530 found = !negative; 531 } 532 free(optbuf); 533 return (found); 534 } 535 536 static void 537 append_arg(struct cpa *sa, char *arg) 538 { 539 if (sa->c + 1 == sa->sz) { 540 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 541 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz); 542 if (sa->a == NULL) 543 xo_errx(1, "realloc failed"); 544 } 545 sa->a[++sa->c] = arg; 546 } 547 548 int 549 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 550 const char *options, const char *mntopts) 551 { 552 struct statfs sf; 553 int i, ret; 554 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 555 static struct cpa mnt_argv; 556 557 /* resolve the mountpoint with realpath(3) */ 558 if (allow_file_mount(vfstype)) { 559 if (checkpath_allow_file(name, mntpath) != 0) { 560 xo_warn("%s", mntpath); 561 return (1); 562 } 563 } else { 564 if (checkpath(name, mntpath) != 0) { 565 xo_warn("%s", mntpath); 566 return (1); 567 } 568 } 569 name = mntpath; 570 571 if (mntopts == NULL) 572 mntopts = ""; 573 optbuf = catopt(strdup(mntopts), options); 574 575 if (strcmp(name, "/") == 0) 576 flags |= MNT_UPDATE; 577 if (flags & MNT_FORCE) 578 optbuf = catopt(optbuf, "force"); 579 if (flags & MNT_RDONLY) 580 optbuf = catopt(optbuf, "ro"); 581 /* 582 * XXX 583 * The mount_mfs (newfs) command uses -o to select the 584 * optimization mode. We don't pass the default "-o rw" 585 * for that reason. 586 */ 587 if (flags & MNT_UPDATE) 588 optbuf = catopt(optbuf, "update"); 589 590 /* Compatibility glue. */ 591 if (strcmp(vfstype, "msdos") == 0) 592 vfstype = "msdosfs"; 593 594 /* Construct the name of the appropriate mount command */ 595 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 596 597 mnt_argv.c = -1; 598 append_arg(&mnt_argv, execname); 599 mangle(optbuf, &mnt_argv); 600 if (mountprog != NULL) 601 strlcpy(execname, mountprog, sizeof(execname)); 602 603 append_arg(&mnt_argv, strdup(spec)); 604 append_arg(&mnt_argv, strdup(name)); 605 append_arg(&mnt_argv, NULL); 606 607 if (debug) { 608 if (use_mountprog(vfstype)) 609 xo_emit("{Lwc:exec}{:execname/%s}", execname); 610 else 611 xo_emit("{:execname/mount}{P: }{l:opts/-t}{P: }{l:opts/%s}", vfstype); 612 for (i = 1; i < mnt_argv.c; i++) 613 xo_emit("{P: }{l:opts}", mnt_argv.a[i]); 614 xo_emit("\n"); 615 free(optbuf); 616 free(mountprog); 617 mountprog = NULL; 618 return (0); 619 } 620 621 if (use_mountprog(vfstype)) { 622 ret = exec_mountprog(name, execname, mnt_argv.a); 623 } else { 624 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 625 } 626 627 free(optbuf); 628 free(mountprog); 629 mountprog = NULL; 630 631 if (verbose) { 632 if (statfs(name, &sf) < 0) { 633 xo_warn("statfs %s", name); 634 return (1); 635 } 636 if (fstab_style) { 637 xo_open_list("fstab"); 638 xo_open_instance("fstab"); 639 putfsent(&sf); 640 xo_close_instance("fstab"); 641 xo_close_list("fstab"); 642 } else { 643 xo_open_list("mounted"); 644 xo_open_instance("mounted"); 645 prmount(&sf); 646 xo_close_instance("mounted"); 647 xo_close_list("mounted"); 648 } 649 } 650 651 return (ret); 652 } 653 654 void 655 prmount(struct statfs *sfp) 656 { 657 uint64_t flags; 658 unsigned int i; 659 struct mntoptnames *o; 660 struct passwd *pw; 661 char *fsidbuf; 662 663 xo_emit("{:special/%hs}{L: on }{:node/%hs}{L: (}{:fstype}", sfp->f_mntfromname, 664 sfp->f_mntonname, sfp->f_fstypename); 665 666 flags = sfp->f_flags & MNT_VISFLAGMASK; 667 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 668 if (flags & o->o_opt) { 669 xo_emit("{D:, }{l:opts}", o->o_name); 670 flags &= ~o->o_opt; 671 } 672 /* 673 * Inform when file system is mounted by an unprivileged user 674 * or privileged non-root user. 675 */ 676 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 677 xo_emit("{D:, }{L:mounted by }"); 678 if ((pw = getpwuid(sfp->f_owner)) != NULL) 679 xo_emit("{:mounter/%hs}", pw->pw_name); 680 else 681 xo_emit("{:mounter/%hs}", sfp->f_owner); 682 } 683 if (verbose) { 684 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) { 685 xo_open_container("writes"); 686 xo_emit("{D:, }{Lwc:writes}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 687 (uintmax_t)sfp->f_syncwrites, 688 (uintmax_t)sfp->f_asyncwrites); 689 xo_close_container("writes"); 690 } 691 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) { 692 xo_open_container("reads"); 693 xo_emit("{D:, }{Lwc:reads}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 694 (uintmax_t)sfp->f_syncreads, 695 (uintmax_t)sfp->f_asyncreads); 696 xo_close_container("reads"); 697 } 698 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 699 fsidbuf = malloc(sizeof(sfp->f_fsid) * 2 + 1); 700 if (fsidbuf == NULL) 701 xo_errx(1, "malloc failed"); 702 for (i = 0; i < sizeof(sfp->f_fsid); i++) 703 sprintf(&fsidbuf[i * 2], "%02x", 704 ((u_char *)&sfp->f_fsid)[i]); 705 fsidbuf[i * 2] = '\0'; 706 xo_emit("{D:, }{Lw:fsid}{:fsid}", fsidbuf); 707 free(fsidbuf); 708 } 709 if (sfp->f_nvnodelistsize != 0) { 710 xo_open_container("vnodes"); 711 xo_emit("{D:, }{Lwc:vnodes}{Lw:count}{w:count/%ju}", 712 (uintmax_t)sfp->f_nvnodelistsize); 713 xo_close_container("vnodes"); 714 } 715 } 716 xo_emit("{D:)}\n"); 717 } 718 719 char * 720 catopt(char *s0, const char *s1) 721 { 722 char *cp; 723 724 if (s1 == NULL || *s1 == '\0') 725 return (s0); 726 727 if (s0 && *s0) { 728 if (asprintf(&cp, "%s,%s", s0, s1) == -1) 729 xo_errx(1, "asprintf failed"); 730 } else 731 cp = strdup(s1); 732 733 if (s0) 734 free(s0); 735 return (cp); 736 } 737 738 void 739 mangle(char *options, struct cpa *a) 740 { 741 char *p, *s, *val; 742 743 for (s = options; (p = strsep(&s, ",")) != NULL;) 744 if (*p != '\0') { 745 if (strcmp(p, "noauto") == 0) { 746 /* 747 * Do not pass noauto option to nmount(). 748 * or external mount program. noauto is 749 * only used to prevent mounting a filesystem 750 * when 'mount -a' is specified, and is 751 * not a real mount option. 752 */ 753 continue; 754 } else if (strcmp(p, "late") == 0) { 755 /* 756 * "late" is used to prevent certain file 757 * systems from being mounted before late 758 * in the boot cycle; for instance, 759 * loopback NFS mounts can't be mounted 760 * before mountd starts. 761 */ 762 continue; 763 } else if (strcmp(p, "failok") == 0) { 764 /* 765 * "failok" is used to prevent certain file 766 * systems from being causing the system to 767 * drop into single user mode in the boot 768 * cycle, and is not a real mount option. 769 */ 770 continue; 771 } else if (strncmp(p, "mountprog", 9) == 0) { 772 /* 773 * "mountprog" is used to force the use of 774 * userland mount programs. 775 */ 776 val = strchr(p, '='); 777 if (val != NULL) { 778 ++val; 779 if (*val != '\0') 780 mountprog = strdup(val); 781 } 782 783 if (mountprog == NULL) { 784 xo_errx(1, "Need value for -o mountprog"); 785 } 786 continue; 787 } else if (strcmp(p, "userquota") == 0) { 788 continue; 789 } else if (strncmp(p, userquotaeq, 790 sizeof(userquotaeq) - 1) == 0) { 791 continue; 792 } else if (strcmp(p, "groupquota") == 0) { 793 continue; 794 } else if (strncmp(p, groupquotaeq, 795 sizeof(groupquotaeq) - 1) == 0) { 796 continue; 797 } else if (*p == '-') { 798 append_arg(a, p); 799 p = strchr(p, '='); 800 if (p != NULL) { 801 *p = '\0'; 802 append_arg(a, p + 1); 803 } 804 } else { 805 append_arg(a, strdup("-o")); 806 append_arg(a, p); 807 } 808 } 809 } 810 811 812 char * 813 update_options(char *opts, char *fstab, int curflags) 814 { 815 char *o, *p; 816 char *cur; 817 char *expopt, *newopt, *tmpopt; 818 819 if (opts == NULL) 820 return (strdup("")); 821 822 /* remove meta options from list */ 823 remopt(fstab, MOUNT_META_OPTION_FSTAB); 824 remopt(fstab, MOUNT_META_OPTION_CURRENT); 825 cur = flags2opts(curflags); 826 827 /* 828 * Expand all meta-options passed to us first. 829 */ 830 expopt = NULL; 831 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 832 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 833 expopt = catopt(expopt, fstab); 834 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 835 expopt = catopt(expopt, cur); 836 else 837 expopt = catopt(expopt, o); 838 } 839 free(cur); 840 free(opts); 841 842 /* 843 * Remove previous contradictory arguments. Given option "foo" we 844 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 845 * and "foo" - so we can deal with possible options like "notice". 846 */ 847 newopt = NULL; 848 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 849 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 850 xo_errx(1, "malloc failed"); 851 852 strcpy(tmpopt, "no"); 853 strcat(tmpopt, o); 854 remopt(newopt, tmpopt); 855 free(tmpopt); 856 857 if (strncmp("no", o, 2) == 0) 858 remopt(newopt, o+2); 859 860 newopt = catopt(newopt, o); 861 } 862 free(expopt); 863 864 return (newopt); 865 } 866 867 void 868 remopt(char *string, const char *opt) 869 { 870 char *o, *p, *r; 871 872 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 873 return; 874 875 r = string; 876 877 for (p = string; (o = strsep(&p, ",")) != NULL;) { 878 if (strcmp(opt, o) != 0) { 879 if (*r == ',' && *o != '\0') 880 r++; 881 while ((*r++ = *o++) != '\0') 882 ; 883 *--r = ','; 884 } 885 } 886 *r = '\0'; 887 } 888 889 void 890 usage(void) 891 { 892 893 xo_error("%s\n%s\n%s\n", 894 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 895 " mount [-dfpruvw] special | node", 896 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 897 EXIT(1); 898 } 899 900 void 901 putfsent(struct statfs *ent) 902 { 903 struct fstab *fst; 904 char *opts, *rw; 905 int l; 906 907 opts = NULL; 908 /* flags2opts() doesn't return the "rw" option. */ 909 if ((ent->f_flags & MNT_RDONLY) != 0) 910 rw = NULL; 911 else 912 rw = catopt(NULL, "rw"); 913 914 opts = flags2opts(ent->f_flags); 915 opts = catopt(rw, opts); 916 917 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 918 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 919 strlcpy(ent->f_mntfromname, 920 (strnstr(ent->f_mntfromname, ":", 8) +1), 921 sizeof(ent->f_mntfromname)); 922 } 923 924 l = strlen(ent->f_mntfromname); 925 xo_emit("{:device}{P:/%s}{P:/%s}{P:/%s}", 926 ent->f_mntfromname, 927 l < 8 ? "\t" : "", 928 l < 16 ? "\t" : "", 929 l < 24 ? "\t" : " "); 930 l = strlen(ent->f_mntonname); 931 xo_emit("{:mntpoint}{P:/%s}{P:/%s}{P:/%s}", 932 ent->f_mntonname, 933 l < 8 ? "\t" : "", 934 l < 16 ? "\t" : "", 935 l < 24 ? "\t" : " "); 936 xo_emit("{:fstype}{P:\t}", ent->f_fstypename); 937 l = strlen(opts); 938 xo_emit("{:opts}{P:/%s}", opts, 939 l < 8 ? "\t" : " "); 940 free(opts); 941 942 if ((fst = getfsspec(ent->f_mntfromname))) 943 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 944 fst->fs_freq, fst->fs_passno); 945 else if ((fst = getfsfile(ent->f_mntonname))) 946 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 947 fst->fs_freq, fst->fs_passno); 948 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 949 if (strcmp(ent->f_mntonname, "/") == 0) 950 xo_emit("{P:\t}{n:dump/1}{P: }{n:pass/1}\n"); 951 else 952 xo_emit("{P:\t}{n:dump/2}{P: }{n:pass/2}\n"); 953 } else 954 xo_emit("{P:\t}{n:dump/0}{P: }{n:pass/0}\n"); 955 } 956 957 958 char * 959 flags2opts(int flags) 960 { 961 char *res; 962 963 res = NULL; 964 965 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 966 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 967 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 968 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 969 if (flags & MNT_UNION) res = catopt(res, "union"); 970 if (flags & MNT_ASYNC) res = catopt(res, "async"); 971 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 972 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 973 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 974 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 975 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 976 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 977 if (flags & MNT_ACLS) res = catopt(res, "acls"); 978 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 979 if (flags & MNT_UNTRUSTED) res = catopt(res, "untrusted"); 980 if (flags & MNT_NOCOVER) res = catopt(res, "nocover"); 981 if (flags & MNT_EMPTYDIR) res = catopt(res, "emptydir"); 982 983 return (res); 984 } 985